I purchased and installed DraftSight Standard. Opened .dwg file to edit. Selected section of drawing in main pane to copy to new file. Mouse froze in main pane. Could still move mouse in menu areas of screen. Tried creating new drawing and mouse moved fine for a few minutes, then froze. SYSTEM: Win10Pro x64 ver 1809, Core i7-4790K, 16GB RAM, Intel HD Graphics 4600 (driver 20.19.15.5063), 2TB free HD space. Suggestions?